Subject to change without notice. Published in U.S.A. 1199088-UAI-D-1018
Copyright © 2018 by Johnson Controls, Inc. All rights reserved. Supersedes: 1199088-UAI-C-0616
York International Corp.
5005 York Drive
Norman, OK 73069
3. If the unit was not shipped with a factory installed filter
frame, omit step 3, and continue procedure starting with
step 4. If the unit was shipped with a factory installed filter
frame, remove the filter frame from the unit before down-
flow economizer is installed. Remove filter frame as follows:
a. Remove two mount screws from the right side rail of
filter frame. See Figures 1 and 7.
b. Remove attachment screw from right side rail and filter
frame bottom piece.
c. Remove screw from top piece of filter frame and right
side rail. Slide right side rail out from U channel of top
filter frame, and remove right side rail from unit
d. Remove attachment screw from left side rail and filter
frame bottom piece.
e. Remove left side rail and filter frame top piece as an
assembly from the unit.
f. Remove bottom of filter frame from unit.
4. Install the downflow economizer in accordance with the kit
installation instructions that come with the downflow econo-
mizer. Refer to 1199083-UAI.
5. After downflow economizer is installed, assemble the filter
frame parts in the unit through the horizontal duct opening
as follows:
a. Place bottom of filter frame in mounting position with
larger end to right toward compressor block off panel.
Insert downward flange into drain pan ledge for sup-
port. See Figure 3.
b. With parts outside the unit, assemble top piece of filter
frame to left side rail by sliding side rail into U channel
of top filter frame, and secure the two parts together by
installing the top screw as shown in Figure 4. Inside
the unit, place lower part of left side rail against filter
frame bottom as shown in Figures 1 and 5. Install
screw securing left side rail onto filter frame bottom
piece.
c. Assemble top piece of filter frame to right side rail by
sliding side rail into U channel of top filter frame, and
install top screw. Place lower part of right side rail
against filter frame bottom as shown in Figures 1 and
6. Install screw securing right side rail onto filter frame
bottom piece.
d. Locate the two anchor screw holes in right side rail. If
unit was shipped without a factory installed filter frame
assembly, use the two anchor holes as a template on
compressor block off panel. Install two 1/2” long self-
tapping #10 screws, and secure the right side rail of
the filter frame to the compressor block off panel. See
Figure 7.
6. Install both “L” brackets (provided with kit). Verify thickness
of filter being used. For “Secondary Installation,” use only a
1” filter.
• For 1” filter, use first “L” bracket to support filter from
behind and second “L” bracket to support filter from front.
See Figure 8.
7. Install a standard off-the-shelf air filter for both large and
small filter frame sizes. Check filter for correct airflow rating
from Table 3.
8. Install the horizontal duct cover on the back of the unit. See
Figure 9. The horizontal duct cover access is now the filter
access opening on any unit that has a downflow econo-
mizer.
9. Return to the unit Installation Manual to finish accomplish-
ing unit installation procedures.
WARNING
• Verify that no part of filter frame is in the path of the econ-
omizer dampers when they are in motion. Any contact
with moving parts will cause heavy damage to the unit.
• Drilling into the compressor compartment should be
avoided due to danger of drilling into and puncturing any
nearby refrigerant lines. To anchor right side rail of filter
frame to the compressor block off panel, self-tapping
screws should be used.
• Verify clearance for screw locations behind compressor
block off panel before installing screws.
!
NOTICE
The filter frame should be snug within the unit. There should
be no visible gaps present between perimeter of filter frame
and unit.
CAUTION
A 1” filter only must be used in installations with downflow
economizers. A 2” filter can not be used.
NOTICE
With a downflow economizer installed, any filters used must
be able to be installed and removed through the horizontal
duct opening. If a one piece filter can not be fit through the
horizontal duct opening, a combination of smaller filters may
be used to cover the filter opening width. It is recommended
to use two 10x20 inch filters for small filter frames and three
10x20 inch filters for large filter frames. Use filter part number
S1-02647812000.
!
